Piston ring



sept., 16,1924@ 1 1,508,929

` F. H. FUNCHESS PISTON RING Filed sept. 27. 1921 mgl.

K ATTORNEY.

Patente Sept. 16, 1924.

FRED II. vrUNCIIRss, or HANFORD, CALIFORNIA, AssIGNoR To SUPER SEALrIs'roN RING COMPANY, Or IIANFORD, CALIFORNIA, A CORPORATION orCALIFORNIA.

rIs'roN RING.

Application filed September 27, 1.921. Serial No. 503,610.

To all whom it may Concern:

' Be it known that I, FRED H. FUNGHESS,

a citizen of the United States, residin at Hanford, in the county ofKings and tate of California, have invented certain new and usefulImprovements in Piston Rings, of which the following is a specification.

This invention relates to packing devices,

more particularly to the packing for pistons of various kinds, and hasfor one-of its objects to improve the construction and increase theeiciency and utility of devices of this character.

With these and other objects in view the invention consists in certainnovel features ofv construction as hereinafter shown and described andthen specifically pointed out in the claims, and in the drawingillustrative of the preferred embodiment of the invention Figure 1 is aside elevation of a conventional piston with the improved packing ringsapplied, and located in a portion of a cylinderb the latter being insection.

Figure 2 is a plan view, partly in section of one of the improvedpacking rings. V

Figure 3 is an enlarged cross section on the line 3-3 of Figure 2.

The body of the piston is represented as a whole at 10 and provided withthe usual annular seats indicated'at 11 to receive the packing rings.

A portion of the cylinder is represented at 12. I I

The imiproved packing is formed in Athree sections, coacting dividedring sections 13 and 14 and an intermediate divided spreader ringsection 15 located between the coacting` outer ring sections.

For the' pur se of this description the face of the pac ng next to thecylinder 12 is referred to as the outer portion or the part contactingwith the inner face of the cylinder, and the part toward the interior ofthe cylinder as the inner portion.

The confronti faces ofv the sections 13 and 14 toward Ithe Cylinder arereversely bevelled as indicated at 16 and 17, while the confrontingfaces of the sections 13 and 14 toward the interior of the cylinder arelikewise reversely bevelled as indicated at 18 and 19.

The intermediate portions of the confronting faces of the members 13 and14 are directed in parallel relationv asy indicated at- 20 and 21.

Theopposite faces of the portion of the member 15 toward the inner faceof the Cylinder 12 arel reversely bevelled as indicated at 22 and 23 toconform'to and closely engage the faces-16 and 17 of the mem bers 13 and14, while the opposite faces of the port-ion of the member 15 toward theinterior of the cylinder are reversely bevelled to conform to andclosely engage the faces 18 and 19 of the members 13 and 14 as indicatedat 24 and 25.

The opposite faces of the intermediate portion of the member 15 aredirected in parallel relation to conform to and initially engage theparallel portions 20 and 21 of the members 13 and 14. 1

The portions of the ring members 13 and 14 next to the cylinder wherethe greater strains or wear occurs are the heavier to. effectuallyresist such wear and strain, and

automatically take up the wear by the Coacl'v tion of the parts.

The divisions or splits between the ends of the several members will be"vso located that no two come in alinement longitudinally o f thecylinder and piston, as-will be obvious.

By this constructionand arrangement of parts it will be noted that thethree parts 13, 14 and 15 of the ring are equal in area, transversely,hence possess e ual strength and wearresisting quality, an also possessequal spring tension and exert equal expansive force.

The coaction of the bevelled faces 18, 24 and 19, 25, hold the back partof the ring against the ring vgroove Or channel, .thus eliminating anytendency to rock on the ring seat.

Another advantage of the improved Construction is that in event of evena very slight irregularity in the inner face of the piston, for instanceavery slight taper even to the thousandth of an inch, the wear is takenup by the central member 15 which expands theouter portions 13 and 14uniformly and prevents unevenness developing between the walls of thegroove or channel.

The preferred 4embodiment of the invention is disclosed in the drawingsand set forth in the specification, but it will be understood thatmodifications within the scope of the claims maybe made in theconstruction without departing from the principle of the invention orsacrificing any oit its advantages.

Having thus described the invention what is claimed as new is l. Apacking comprising a pair of outer resilient split rings and anintermediate split resilient ring interposed between said outer rings,the body portion of said intermediate ring diverging from its outer edgeto a point adjacent one side of the center of said body portion andfurther converging trom its inner edge to a ypoint adjacent the otherside of the center of said body portion, and the body portion of eachouter ring having its inner face formed with a pair of'spaced bevelledsurfaces, one extending inwardly from the outer edge and the otherinwardly from the inner edge of said loody portion, one of the bevelledsurfaces of each of the outer rings riding against the diverging portionof the inner ring and the other bevelled surface of each of the outerrings riding against the converging portion of the inner ring.

2. A packing comprising a pair of outer and an intermediatesplitresilient ring interposed between said outer rings, each outer ringhaving its inner face formed with a pair of spaced bevelled surfacesextending in parallel planes in transverse section at any pointthroughout and further provided with a substantially wide centrallydisposed plane surface Separating the hevelled surspaced bevelledsurfaces extending in parallei planes in transverse section at any pointthroughout, and each tace further provided with a substantially widecentrally disposed plane surface separating a pair oit loevelledsurfaces and extending in a plane vparallel to the outer face of eachouter ring, the outer edge of said inner section being ot materiallyless width than the inner edge thereof.,

3. A aching comprising a pair oit outer and an intermediate splitresilient ring interposed between said outer rings, each outer ringhaving its inner tace formed with a pair of spaced bevelled surfacesextending in parallel planes in transverse section at any pointthroughout, and said intermediate ring having its inner and its outerface each formed with a pair of spaced bevelled surfaces extending inparallel planes in transverse section at any point throughout, one oithe bevelled surfaces on each of said faces oit the intermediate ringextending from the outer edge of the ring and the other of the hevelledsurfaces on each of said faces of the intermediate ring extending from apoint inwardly of and terminating at the inner edge or said ring l lintestimony whereof li ax my signature hereto.

FRED H. FUNCHESS

